HF

Heart Failure

  • Definition: Myocardial disease with issues in heart contraction (systolic dysfunction) or filling (diastolic dysfunction).

    • Leads to pulmonary/systemic congestion.

    • Some cases reversible, most are chronic and progressive.

  • Management: Lifestyle changes and medications required.

Pathophysiology of Heart Failure

  • Myocardial Dysfunction Causes:

    • Ischemic heart disease

    • Myocardial infarction

    • Alcohol/cocaine abuse

    • Chronic hypertension

  • Regulatory Mechanisms:

    • Activation of baroreceptors - aortic arch, carotid sinus.

    • Stimulation of renin-angiotensin system leading to vasoconstriction and fluid retention.

    • Sympathetic nervous system activation impacting heart rate and vascular resistance.

  • Resulting Changes:

    • Hypertrophy and dilation of the ventricle.

    • Impaired contractility.

Clinical Manifestations of Heart Failure

  • Right-Sided Heart Failure:

    • Viscera and peripheral congestion.

    • Jugular venous distention (JVD).

    • Dependent edema, hepatomegaly, ascites.

    • Weight gain.

  • Left-Sided Heart Failure:

    • Pulmonary congestion with crackles.

    • Presence of S3 heart sound (“ventricular gallop”).

    • Dyspnea on exertion (DOE) and low oxygen saturation.

    • Dry, nonproductive cough initially; oliguria.

Medical Management

  • Treatment: Varies by severity and comorbidities.

    • Medications:

    • Oral and IV medications, diuretics, ACE inhibitors, beta-blockers.

    • Consider lifestyle modifications, supplemental O2, surgical interventions (ICD, transplantation).

    • Educate patient and family comprehensively.

Medications Used

  • Diuretics: Decrease fluid volume; monitor serum electrolytes.

  • ACE Inhibitors: Cause vasodilation; monitor for hypotension and renal function.

  • ARBs: Alternative to ACE; similar effects.

  • Beta-Blockers: Takes weeks for full effect; use cautiously in asthmatics.

  • Ivabradine: Slows heart rate; monitor HR and BP.

  • Hydralazine and Isosorbide Dinitrate: Alternate vasodilators.

  • Digitalis: Enhances contractility; watch for toxicity, especially hypokalemia.

IV Medications for Acute HF

  • Indications: For hospitalized patients with acute decompensated HF.

    • Dopamine: Improves BP and myocardial contractility.

    • Dobutamine: Increases cardiac contractility and renal perfusion.

    • Milrinone: Decreases preload and afterload; hypotension risk.

    • Vasodilators: IV nitro, nitroprusside for symptom relief.

Patient Assessment

  • Focus on:

    • Effectiveness of therapy.

    • Patient’s self-management and signs of worsening HF.

    • Health history and physical examination.

  • Monitoring: Mental status, lung sounds (crackles), heart sounds (S3), daily weight, and I&O.

Collaborative Problems and Complications

  • Common issues include:

    • Pulmonary edema.

    • Cardiogenic shock, hypotension.

    • Arrhythmias and thromboembolism.

    • Pericardial effusion.

Goals and Planning

  • Goals for patient include:

    • Promote activity and reduce fatigue.

    • Relieve fluid overload symptoms.

    • Manage anxiety effectively.

    • Educate patient and family.

Nursing Interventions

  • Activity Management:

    • Encourage regular activity; build up to 30 minutes daily.

    • Educate about pacing activities and avoiding extreme weather.

    • Positioning for optimal breathing (head elevation).

  • Fluid Management:

    • Monitor for signs of fluid overload; maintain daily weight and I&O.

    • Proper timing of diuretics.

    • Sodium and fluid restrictions discussed.

Patient Education

  • Instruct on:

    • Medication adherence and side effects.

    • Diet: low sodium and fluid intake.

    • Early signs of excess fluid and when to contact healthcare provider.

    • Stress management and exercise plans.

Pulmonary Edema Management

  • Causes: Result of left ventricular failure.

  • Signs: Restlessness, dyspnea, cyanosis with cough and lung congestion.

  • Management: Early recognition through monitoring, oxygen therapy, diuretics, and vasodilators.

Pericardial Effusion and Cardiac Tamponade

  • Definition: Fluid accumulation in the pericardial sac causing restricted heart function.

  • Clinical Signs:

    • Chest pain, jugular vein engorgement, low BP, dyspnea.

    • Signs of cardiac tamponade: falling BP, narrowing pulse pressure, distant heart sounds.

  • Management:

    • Pericardiocentesis: Aspiration of fluid.

    • Pericardiotomy: Surgical drainage procedure.

Sudden Cardiac Death / Cardiac Arrest

  • Emergency Management: Early recognition and actions - CPR:

    • Maintain airway, breathing, circulation.

    • Use defibrillation for Ventricular Tachycardia (VT) and Ventricular Fibrillation (VF).